CYMEL® 304

The stability of formulated systems containing CYMEL 304 resin can be enhanced by the addition of primary alcohols, such as methanol, ethanol, and butanol. Higher concentrations will improve catalyzed pot life. Faster evaporating alcohols will improve speed of dry.

CYMEL® 304 Resin requires the addition of a sulfonic acid catalyst, such as CYCAT® 4040 catalyst, at levels of 6-10% on total resin solids in order to obtain effective cure for both ambient and heat-cured applications. For pre-catalyzed urea-rich systems, 2.0% PAP based on the weight of total binder solids is recommended.

• CYMEL® 304 Resin has excellent compatibility with a wide variety of polyols, such as alkyd, acrylic, and polyester resins. Polyols with primary hydroxyl functionality are preferred for fast cure at ambient conditions.
• The effective equivalent weight of CYMEL® 304 Resin is approximately 150, however, its optimum loading should be determined experimentally for each formulation with consideration of the performance properties to be optimized.

• CYMEL® 304 Resin has a shelf life of 5 years from the date of manufacture when stored at temperatures between 5°C and 30°C. Although lower temperatures are not detrimental to stability, its viscosity will increase, possibly making the resin difficult to pump or pour.
• The viscosity will reduce again on warming, but care should be taken to avoid excessive local heat, as this can cause an irreversible increase in viscosity.